Wyoming Snow Precipitation Update
United States Natural Resources Water and Climate Center
Department of Conservation Portland, Oregon
Agriculture Service
S N O W - P R E C I P I T A T I O N U P D A T E
Based on Mountain Data from NRCS SNOTEL Sites
As of WEDNESDAY: JANUARY 20 , 1999
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
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WYOMING
SNAKE RIVER
BASE CAMP 7030 13.5 10.8 125 15.4 14.3 108
COTTONWOOD CREEK 7600 12.0 12.2 98 15.1 15.2 99
GRANITE CREEK 6770 10.4 10.5 99 12.4 15.1 82
GRASSY LAKE 7265 22.8 19.8 115 23.4 23.2 101
GROS VENTRE SUMMIT 8775 8.0 9.3 86 8.3 10.2 81
LEWIS LAKE DIVIDE 7860 21.7 19.6 111 23.2 23.6 98
PHILLIPS BENCH 8200 16.7 16.5 101 16.8 18.6 90
SALT RIVER SUMMIT 7600 7.5 7.6 99 9.8 10.8 91
SNAKE RIVER STATION 6920 12.4 10.7 116 15.2 16.4 93
SPRING CREEK DIVIDE 9000 15.0 15.7 96 15.3 17.0 90
THUMB DIVIDE 7980 12.8 9.9 129 13.0 13.4 97
TOGWOTEE PASS 9580 -M 14.8 * 17.9 17.7 101
TWO OCEAN PLATEAU 9360 21.7 16.2 134 19.2 19.8 97
WILLOW CREEK 8450 16.0 18.0 89 21.1 20.0 106
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Basin wide percent of average 108 96
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 17.4 14.4 121 15.7 10.7 147
BLACK BEAR 7950 27.4 21.2 129 23.1 22.9 101
CANYON 7940 10.9 7.2 151 11.9 8.7 137
FISHER CREEK 9100 25.4 21.1 120 22.6 21.3 106
MADISON PLATEAU 7750 -M 13.9 * 17.4 15.1 115
NORTHEAST ENTRANCE 7350 7.8 5.6 139 9.6 7.3 132
PARKER PEAK 9400 15.0 13.0 115 -M 9.4 *
SYLVAN LAKE 8420 16.7 13.4 125 19.1 11.9 161
THUMB DIVIDE 7980 12.8 9.9 129 13.0 13.4 97
TWO OCEAN PLATEAU 9360 21.7 16.2 134 19.2 19.8 97
WHISKEY CREEK 6800 11.4 9.6 119 14.0 12.6 111
WHITE MILL 8700 16.5 14.9 111 15.1 16.8 90
WOLVERINE 7650 10.6 6.9 154 8.7 7.9 110
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Basin wide percent of average 126 112
WIND RIVER
BURROUGHS CREEK 8750 10.6 9.2 115 11.5 10.1 114
COLD SPRINGS 9630 6.0 5.3 113 7.6 6.4 119
DEER PARK 9700 8.3 -M * 11.8 -M *
HOBBS PARK 10100 9.2 9.2 100 9.4 8.3 113
LITTLE WARM 9620 8.0 6.4 125 9.2 8.0 115
SOUTH PASS 9040 9.4 10.2 92 10.9 9.7 112
ST. LAWRENCE ALT 8620 4.1 4.2 98 6.8 5.8 117
TOGWOTEE PASS 9580 -M 14.8 * 17.9 17.7 101
TOWNSEND CREEK 8700 4.9 5.6 88 7.5 7.0 107
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Basin wide percent of average 104 111
BIGHORN BASIN
BALD MTN. 9375 13.3 12.5 106 12.5 10.5 119
BEAR TRAP MEADOW 7900 4.2 4.4 95 6.8 5.0 136
BLACKWATER 9780 19.1 12.5 153 16.6 10.9 152
BONE SPRINGS DIV 9350 10.3 9.6 107 10.5 8.4 125
EVENING STAR 9200 22.2 16.1 138 23.0 13.6 169
GRAVE SPRINGS 8550 4.7 5.5 85 7.7 5.9 131
KIRWIN 9550 7.8 6.1 128 9.1 6.2 147
MARQUETTE 8760 5.5 4.7 117 6.3 5.4 117
MIDDLE POWDER 7760 4.8 7.1 68 10.9 7.1 154
OWL CREEK 8975 3.7 2.5 148 4.5 3.4 132
POWDER RIVER PASS 9480 7.9 6.3 125 9.9 6.9 143
SHELL CREEK 9580 11.4 9.3 123 10.7 7.9 135
SYLVAN LAKE 8420 16.7 13.4 125 19.1 11.9 161
SYLVAN ROAD 8120 11.3 7.4 153 13.1 9.9 132
TIMBER CREEK 7950 3.5 3.2 109 5.4 3.9 138
YOUNTS PEAK 8350 13.7 11.0 125 11.9 10.0 119
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Basin wide percent of average 122 140
SHOSHONE RIVER
BLACKWATER 9780 19.1 12.5 153 16.6 10.9 152
EVENING STAR 9200 22.2 16.1 138 23.0 13.6 169
KIRWIN 9550 7.8 6.1 128 9.1 6.2 147
MARQUETTE 8760 5.5 4.7 117 6.3 5.4 117
SYLVAN LAKE 8420 16.7 13.4 125 19.1 11.9 161
SYLVAN ROAD 8120 11.3 7.4 153 13.1 9.9 132
YOUNTS PEAK 8350 13.7 11.0 125 11.9 10.0 119
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Basin wide percent of average 135 146
POWDER-TONGUE
BEAR TRAP MEADOW 7900 4.2 4.4 95 6.8 5.0 136
BIG GOOSE 7990 3.6 -M * 6.5 -M *
BONE SPRINGS DIV 9350 10.3 9.6 107 10.5 8.4 125
BURGESS JUNCTION 7880 5.2 6.8 76 7.1 6.5 109
CLOUD PEAK RESERVOIR 9860 9.5 7.1 134 8.5 7.3 116
DOME LAKE 8880 5.4 8.0 68 7.2 8.0 90
GRAVE SPRINGS 8550 4.7 5.5 85 7.7 5.9 131
HANSEN SAWMILL 8760 3.4 4.1 83 5.6 4.6 122
MIDDLE POWDER 7760 4.8 7.1 68 10.9 7.1 154
POWDER RIVER PASS 9480 7.9 6.3 125 9.9 6.9 143
SUCKER CREEK 8880 6.5 6.6 98 8.7 7.8 112
TIE CREEK 6870 2.2 -M * 5.7 6.3 90
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Basin wide percent of average 95 120
BELLE FOURCHE
BLIND PARK 6890 4.7 6.5 72 11.8 5.6 211
NORTH RAPID CREEK 6130 3.8 -M * 10.5 -M *
WARREN PEAK 6520 5.7 6.5 88 10.8 4.7 230
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Basin wide percent of average 80 219
UPPER N. PLATTE RIVER
COLUMBINE 9400 12.1 13.7 88 14.0 14.2 99
DIVIDE PEAK 8800 10.1 12.0 84 15.9 14.5 110
ELK RIVER 8700 8.5 10.9 78 14.0 11.1 126
JOE WRIGHT 10120 12.2 12.7 96 17.4 14.6 119
NORTH FRENCH CREEK 10100 17.3 14.3 121 18.6 13.5 138
OLD BATTLE 10000 14.9 18.3 81 21.1 17.4 121
SOUTH BRUSH CREEK 8400 5.7 6.3 90 13.4 10.4 129
TOWER 10500 23.9 26.2 91 24.2 21.2 114
WEBBER SPRINGS 9200 10.6 15.5 68 15.4 15.3 101
WILLOW CREEK PASS 9540 5.7 6.7 85 7.5 7.1 106
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Basin wide percent of average 89 116
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 11.6 14.6 79 14.3 10.7 134
CASPER MTN. 7900 5.0 8.6 58 10.6 8.0 132
DEADMAN HILL 10220 11.1 10.0 111 11.9 9.2 129
DEER PARK 9700 8.3 -M * 11.8 -M *
LAPRELE CREEK 8320 1.6 5.9 27 8.3 6.6 126
RENO HILL 8400 6.7 7.6 88 11.1 10.7 104
ROACH 9700 9.9 9.8 101 12.7 12.7 100
SAND LAKE 10080 19.0 18.9 101 18.5 11.6 159
SOUTH PASS 9040 9.4 10.2 92 10.9 9.7 112
WINDY PEAK 7840 2.5 3.9 64 8.2 5.2 158
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Basin wide percent of average 86 126
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 5.8 6.5 89 10.5 9.6 109
DIVIDE PEAK 8800 10.1 12.0 84 15.9 14.5 110
OLD BATTLE 10000 14.9 18.3 81 21.1 17.4 121
SANDSTONE RS 8150 6.2 8.2 76 12.5 11.6 108
WHISKEY PARK 8950 14.0 16.4 85 18.5 16.8 110
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Basin wide percent of average 83 112
UPPER GREEN RIVER
BIG SANDY OPENING 9100 8.8 8.3 106 8.2 10.5 78
BLIND BULL SUM 8650 15.3 16.7 92 12.6 14.5 87
EAST RIM DIVIDE 7930 7.2 8.0 90 7.6 9.7 78
ELKHART PARK G.S. 9400 7.1 7.8 91 7.7 10.3 75
GROS VENTRE SUMMIT 8775 8.0 9.3 86 8.3 10.2 81
KENDALL R.S. 7740 7.9 8.6 92 8.6 9.9 87
LOOMIS PARK 8240 9.5 10.0 95 11.0 12.1 91
NEW FORK LAKE 8340 6.3 6.7 94 6.6 9.3 71
SNIDER BASIN 8250 7.8 8.5 92 8.5 9.7 88
SPRING CREEK DIVIDE 9000 15.0 15.7 96 15.3 17.0 90
TRIPLE PEAK 8500 14.4 15.0 96 16.1 20.0 81
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Basin wide percent of average 94 83
LOWER GREEN RIVER
HAMS FORK 7840 6.0 6.8 88 5.9 8.6 69
HEWINTA 9500 4.6 5.4 85 7.4 7.6 97
HICKERSON PARK 9150 2.9 3.1 94 5.6 5.5 102
HOLE-IN-ROCK 9150 3.7 2.8 132 6.2 5.5 113
INDIAN CREEK 9425 13.8 15.7 88 11.9 16.1 74
KELLEY R.S. 8180 8.2 9.2 89 9.9 12.0 83
STEEL CREEK PARK 10100 6.7 8.9 75 8.8 7.9 111
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Basin wide percent of average 88 88
UPPER BEAR RIVER
BUG LAKE 7950 7.3 11.5 63 9.2 11.5 80
HAYDEN FORK 9400 6.8 9.1 75 10.0 10.7 93
KELLEY R.S. 8180 8.2 9.2 89 9.9 12.0 83
LILY LAKE 9050 6.6 7.5 88 9.6 8.6 112
MONTE CRISTO 8960 10.7 15.2 70 13.3 14.9 89
SALT RIVER SUMMIT 7600 7.5 7.6 99 9.8 10.8 91
TRIAL LAKE 9960 7.8 14.2 55 8.9 13.6 65
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Basin wide percent of average 74 86
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-M = Missing data
* = Data may not provide a valid measure of conditions.
If the Basin wide percent of average value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Average represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the average value for those sites on this day.
The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the average value for those sites on this day.
Contact your state water supply staff for assistance.
Reference period for average conditions is 1961-90.
Provisional data, subject to revision.
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Normal Snow Water Equivalent and
Total Precipitation values
If the Basin Index (%) value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Median represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median value for those sites on this day.
The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Average value for those sites on this day.
Contact your state water supply staff for assistance.
Medians and averages are calculated for the period 1981-2010.
Provisional data, subject to revision.
* Site -- Either: (a) the current value is missing; (b) the median or
average for the day is not available or is zero; or (c) for snow water
equivalent, the median for the day is less than 10% of the maximum
median value for the year.
* Basin - More than half of the sites within the basin are flagged with *,
preventing the calculation of a meaningful basin index.
The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians (for snow water equivalent)
or averages (for precipitation) and the resulting fraction multiplied by 100.